DIN Sealing Washers | McMaster-Carr

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119 Products

Sealing Washers

Prevent leaks while distributing weight evenly under nuts and screws. These washers compress as you tighten to keep air and fluid in, and dust and contaminants out. Use them anywhere you need a tight seal, such as protecting electronics from moisture or keeping lubricants contained in machinery.

Metal

Also known as crush washers, these are made of soft metal that deforms under pressure to fill gaps around the nut or screw. Often found in oil drain valves, they withstand stress and wear better than plastic and rubber washers, but aren't as leak-resistant. Metal sealing washers are not reusable.

Copper—Softer than aluminum washers, these deform easily to create a tight seal with less effort. They resist rusting in corrosive environments, but will develop a green patina over time.

Cellulose-Filled Copper—The easiest washers to crush. These washers are embedded with cellulose, which makes them more flexible than other metal washers for a tighter seal. They resist rusting in corrosive environments, but will develop a green patina over time.

Aluminum—These washers are an economical alternative to copper. They have similar corrosion resistance but require more effort to crush.

	For Screw Size	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Copper


		M5	5.200	10.400	0.8 to 1.2	DIN 7603	25	000000000	000000
		M6	6.200	9.900	0.8 to 1.2	DIN 7603	25	000000000	00000
		M6	6.200	11.900	0.8 to 1.2	DIN 7603	25	000000000	00000
		M6	6.200	12.400	1.3 to 1.7	DIN 7603	25	000000000	00000
		M8	8.200	11.900	0.8 to 1.2	DIN 7603	25	000000000	00000
		M8	8.200	12.400	1.3 to 1.7	DIN 7603	25	000000000	00000
		M8	8.200	13.900	0.8 to 1.2	DIN 7603	25	000000000	00000
		M10	10.200	13.900	0.8 to 1.2	DIN 7603	25	000000000	00000
		M10	10.200	13.900	1.3 to 1.7	DIN 7603	10	000000000	0000
		M10	10.200	15.900	1.3 to 1.7	DIN 7603	25	000000000	00000
		M12	12.200	15.900	1.3 to 1.7	DIN 7603	25	000000000	00000
		M12	12.200	16.200	0.8 to 1.2	DIN 7603	25	000000000	00000
		M12	12.200	17.900	1.3 to 1.7	DIN 7603	25	000000000	00000
		M13	13.200	17.900	1.3 to 1.7	DIN 7603	25	000000000	00000
		M14	14.200	17.900	0.8 to 1.2	DIN 7603	10	000000000	00000
		M14	14.200	17.900	1.3 to 1.7	DIN 7603	10	000000000	00000
		M14	14.200	19.900	1.3 to 1.7	DIN 7603	10	000000000	00000
		M16	16.200	19.900	1.3 to 1.7	DIN 7603	10	000000000	00000
		M16	16.200	21.900	1.3 to 1.7	DIN 7603	10	000000000	00000
		M16	16.200	21.900	1.8 to 2.2	DIN 7603	10	000000000	00000
		M17	17.200	21.900	1.3 to 1.7	DIN 7603	10	000000000	0000
		M18	18.200	21.900	1.3 to 1.7	DIN 7603	5	000000000	0000
		M18	18.200	23.900	1.3 to 1.7	DIN 7603	10	000000000	00000
		M20	20.200	23.900	1.3 to 1.7	DIN 7603	5	000000000	0000
		M20	20.200	25.900	1.3 to 1.7	DIN 7603	5	000000000	00000
		M21	21.200	25.900	1.3 to 1.7	DIN 7603	10	000000000	00000
		M22	22.200	26.900	1.3 to 1.7	DIN 7603	5	000000000	00000
		M22	22.200	28.900	1.3 to 1.7	DIN 7603	5	000000000	00000
		M24	24.300	29.900	1.8 to 2.2	DIN 7603	5	000000000	00000
		M26	26.300	31.900	1.8 to 2.2	DIN 7603	5	000000000	00000
		M27	27.300	31.900	1.8 to 2.2	DIN 7603	10	000000000	00000
		M28	28.300	35.900	1.3 to 1.7	DIN 7603	5	000000000	00000
		M30	30.300	35.900	1.8 to 2.2	DIN 7603	5	000000000	00000
		M32	32.300	37.900	1.8 to 2.2	DIN 7603	5	000000000	00000
		M33	33.300	38.900	1.8 to 2.2	DIN 7603	5	000000000	00000
		M36	36.300	41.900	1.8 to 2.2	DIN 7603	5	000000000	00000
		M36	36.300	43.900	1.8 to 2.2	DIN 7603	1	000000000	00000
		M38	38.300	43.900	1.8 to 2.2	DIN 7603	1	000000000	00000
		M42	42.300	48.900	1.8 to 2.2	DIN 7603	1	000000000	00000
		M48	48.300	54.900	1.8 to 2.2	DIN 7603	1	000000000	00000

		Cellulose-Filled Copper


				M6	6.200	9.900	1.3 to 1.7	DIN 7603	25	000000000	00000
				M8	8.200	11.900	1.3 to 1.7	DIN 7603	25	000000000	00000
				M8	8.200	13.900	1.3 to 1.7	DIN 7603	25	000000000	00000
				M10	10.200	13.900	1.3 to 1.7	DIN 7603	25	000000000	00000
				M10	10.200	15.900	1.3 to 1.7	DIN 7603	25	000000000	00000
				M12	12.200	15.900	1.8 to 2.2	DIN 7603	25	000000000	00000
				M12	12.200	17.900	1.8 to 2.2	DIN 7603	25	000000000	00000
				M14	14.200	17.900	1.8 to 2.2	DIN 7603	10	000000000	00000
				M14	14.200	19.900	1.8 to 2.2	DIN 7603	10	000000000	00000
				M16	16.200	19.900	1.8 to 2.2	DIN 7603	10	000000000	00000
				M18	18.200	23.900	1.8 to 2.2	DIN 7603	10	000000000	00000
				M20	20.200	23.900	1.8 to 2.2	DIN 7603	10	000000000	00000
				M20	20.200	25.900	1.8 to 2.2	DIN 7603	10	000000000	00000
				M22	22.200	26.900	1.8 to 2.2	DIN 7603	10	000000000	00000
				M24	24.300	31.900	2.3 to 2.7	DIN 7603	10	000000000	00000
				M26	26.300	30.900	2.3 to 2.7	DIN 7603	10	000000000	00000
				M26	26.300	31.900	2.3 to 2.7	DIN 7603	10	000000000	00000
				M26	26.300	33.900	2.3 to 2.7	DIN 7603	10	000000000	00000
M28				28.300	33.900	2.3 to 2.7	DIN 7603	5	000000000	00000
M30	30.300			35.900	2.3 to 2.7	DIN 7603	5	000000000	00000
M32	32.300			37.900	2.3 to 2.7	DIN 7603	5	000000000	00000
M36	36.300			41.900	2.3 to 2.7	DIN 7603	5	000000000	00000
M38	38.300			43.900	2.3 to 2.7	DIN 7603	5	000000000	00000
M42	42.300			48.900	2.3 to 2.7	DIN 7603	1	000000000	00000
M48	48.300			54.900	2.3 to 2.7	DIN 7603	1	000000000	00000
M50	50.200			56.900	2.3 to 2.7	DIN 7603	1	000000000	00000

Aluminum


				M6	6.200	9.900	0.8 to 1.2	DIN 7603	50	000000000	00000
				M6	6.200	11.900	0.8 to 1.2	DIN 7603	50	000000000	00000
				M8	8.200	11.900	0.8 to 1.2	DIN 7603	50	000000000	00000
				M8	8.200	13.900	0.8 to 1.2	DIN 7603	10	000000000	0000
				M10	10.200	13.900	0.8 to 1.2	DIN 7603	50	000000000	00000
				M10	10.200	13.900	1.3 to 1.7	DIN 7603	10	000000000	0000
				M10	10.200	15.900	0.8 to 1.2	DIN 7603	50	000000000	00000
				M10	10.200	15.900	1.3 to 1.7	DIN 7603	10	000000000	0000
				M12	12.200	15.900	1.3 to 1.7	DIN 7603	50	000000000	00000
				M12	12.200	17.900	1.3 to 1.7	DIN 7603	50	000000000	00000
				M14	14.200	17.900	1.3 to 1.7	DIN 7603	25	000000000	00000
				M14	14.200	19.900	1.3 to 1.7	DIN 7603	25	000000000	00000
				M16	16.200	19.900	1.3 to 1.7	DIN 7603	25	000000000	00000
				M16	16.200	21.900	1.3 to 1.7	DIN 7603	10	000000000	00000
				M18	18.200	21.900	1.3 to 1.7	DIN 7603	5	000000000	0000
				M18	18.200	23.900	1.3 to 1.7	DIN 7603	10	000000000	00000
				M20	20.200	23.900	1.3 to 1.7	DIN 7603	5	000000000	0000
				M20	20.200	25.900	1.3 to 1.7	DIN 7603	10	000000000	00000
				M22	22.200	26.900	1.3 to 1.7	DIN 7603	10	000000000	00000
				M24	24.300	29.900	1.8 to 2.2	DIN 7603	10	000000000	00000
				M24	24.300	31.900	1.8 to 2.2	DIN 7603	5	000000000	0000
				M26	26.300	31.900	1.8 to 2.2	DIN 7603	10	000000000	00000

Hard Fiber

An economical alternative to metal crush washers, these compress easily to create a seal with less effort. However, fiber washers degrade faster than metal washers and aren't as heat resistant. They also don't seal quite as tightly as their plastic or rubber counterparts. These washers are reusable, as long as the material isn't damaged.

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Hard Fiber


	M5	5	8	0.8	DIN 7603	100	000000000	00000
	M5	5	10	0.8	DIN 7603	100	000000000	0000
	M6	6	9	0.8	DIN 7603	100	000000000	0000
	M6	6	10	0.8	DIN 7603	100	000000000	0000
	M8	8	12	0.8	DIN 7603	100	000000000	0000
	M8	8	14	0.8	DIN 7603	100	000000000	0000
	M10	10	14	0.8	DIN 7603	100	000000000	0000
	M10	10	16	1	DIN 7603	100	000000000	0000
	M12	12	16	0.8	DIN 7603	100	000000000	0000
	M12	12	18	1	DIN 7603	100	000000000	0000
	M12	12	20	0.8	DIN 7603	100	000000000	0000
	M12	12	24	0.8	DIN 7603	100	000000000	0000
	M14	14	18	1	DIN 7603	100	000000000	0000
	M14	14	24	0.8	DIN 7603	100	000000000	0000
	M16	16	21	0.8	DIN 7603	100	000000000	0000
	M18	18	22	0.8	DIN 7603	100	000000000	0000
	M18	18	24	0.8	DIN 7603	100	000000000	0000
	M22	22	27	0.8	DIN 7603	100	000000000	0000

Sealing Washer Assortments

Keep a collection of metal sealing washers on hand to prevent leaks while distributing weight evenly under nuts and screws. Also known as crush washers, these deform when tightened to lock air and fluid in, while keeping dust and contaminants out. They are not reusable.

Labels in the lid include our part numbers, so it's easy to replenish the assortments.

Copper—Softer than aluminum washers, these deform easily to create a tight seal with less effort. They resist rusting in corrosive environments, but will develop a green patina over time.

Aluminum—These washers are an economical alternative to copper. They have similar corrosion resistance but require more effort to crush.

	Sizes Included	Specs. Met	Container Type		Each
Copper


	555	For M5 to M42 Screw Sizes	DIN 7603	Plastic Box	000000000	0000000

	Aluminum


			570	For M6 to M30 Screw Sizes	DIN 7603	Plastic Box	000000000	000000

Hard Fiber Washers

The least likely to scratch or mar delicate mounting surfaces, these washers are made of hardened cotton fiber. They are also naturally nonconductive, so they are a great choice for insulating nuts and screws to prevent unintended charges. However, fiber washers will break down faster than other washers and will need to be replaced more often.

For Screw Size	ID, mm	OD, mm	Thk., mm	Specs. Met	Color	Pkg. Qty.	Pkg.
M2.5	2.7	6.5	0.4 to 0.6	DIN 125	Black	100	000000
M3	3.2	7	0.4 to 0.6	DIN 125	Black	100	00000
M4	4.3	9	0.7 to 0.9	DIN 125	Black	100	00000
M6	6.4	12.5	1.4 to 1.7	DIN 125	Black	50	0000
M8	8.4	17	1.4 to 1.7	DIN 125	Black	50	0000
M10	10.5	21	1.8 to 2.2	DIN 125	Black	50	00000
M12	13	24	2.1 to 2.5	DIN 125	Black	50	00000
M16	17	30	2.1 to 2.5	DIN 125	Black	25	0000
M20	21	37	2.1 to 2.5	DIN 125	Black	25	00000
M24	25	44	2.8 to 3.5	DIN 125	Black	10	0000
M30	31	56	2.8 to 3.6	DIN 125	Black	10	00000